package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortPoint {
    public static void main(String[] args) {
        List<Point>list=new ArrayList<>();
        list.add(new Point(4,9));
        list.add(new Point(11,59));
        list.add(new Point(54,954));
        list.add(new Point(12,64));
        list.add(new Point(1,4));
        System.out.println("原始数据:"+list);

        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
               /* return o1.getX()-o2.getX();//x升序*/
                int len1=o1.getX()*o1.getX()+o1.getY()*o1.getY();
                /*return len1-len2;//长度升序*/
                int len2=o2.getX()*o2.getX()+o2.getY()*o2.getY();
                  return len2-len1;//长度降序
            }
        });
        System.out.println("list排序后的数据:"+list);
    }
}
